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Strengthening mechanism of Nd: Yag laser shock peening for commercially pure titanium (CP-TI) on surface integrity and residual stresses
摘要： In the present work, an attempt has been made to investigate the effect of generating shock waves through direct and con?ned ablation modes of plasma method of massive laser shock peening (MLSP) on surface integrity of cast dumbbell shaped and cylindrical cast specimens of commercially pure titanium (CP-Ti) and to compare with those of untreated CP-Ti. The MLSP is usually performed in a massively peening mode to induce uniform compressive residual stress and surface deformation across the entire specimens. After MLSP, tensile testing was carried out to obtain the tensile strength, modulus of elasticity and percentage elongation. The microstructural and surface topography investigations of the laser shock peened material were carried out using digital, optical microscopy and SEM equipped with an energy dispersive spectrometer (EDS) and XRD. The results show that laser shock peened with con?ned ablation make the surface of CP-Ti with improved change in microstructure, increase in tensile strength, microhardness (73.08%), surface roughness and compressive residual stresses ((cid:1)420 MPa) which prolongs the mastication ability and dimensional stability of dental implant restorative materials.
关键词： Massive laser peening,Direct ablation mode,Con?ned ablation mode,Microstructure,Microhardness
更新于2025-09-19 17:13:59
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Enhancing cutaneous delivery with laser technology: almost there, but not yet
摘要： Preclinical research has shown the potential of different laser-based strategies (direct ablation, photothermolysis and mechanical waves) to overcome the stratum corneum and facilitate the cutaneous delivery of drugs. However, specific protocols for the routine use of these strategies have not been stablished yet. The aim of this review has been to provide the readers with a view of the translational prospects of the different laser technologies with regards to their utility for enhancing the penetration of drugs.
关键词： Photothermolysis,Direct ablation,CO2 laser,Er:YAG laser,Mechanical waves,Medical lasers
更新于2025-09-19 17:13:59